Tube-number record
FTL 3-1
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BrandBrown Boveri
ClassAir-Cooled Power Triode
Construction
Primary TypeTriode
EnvelopeGlass/Metal
SectionsSingle
Filament / Heater
MaterialThoriated tungsten
Absolute Maximum Ratings
Plate Voltage7000 V
Plate Dissipation3500 W
Grid 1 Voltage-1000 V
Cathode Current1750 mA
Audio Performance
Key Features
- Directly heated
- Forced air cooling
- Industrial and communication applications
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class C RF, unmodulated | 5000 V | 12000 | — | 20 | 1750 mA |
| Class B AF Power Amplifier (2 tubes) | 5000 V | — | — | 20 | 3000 mA |
Application Notes
Class C RF amplifier, oscillator for industrial use, Class B AF power amplifier and modulator.
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